var arr=[3322,22,245,387,2,1246];
var max=min=arr[0];
for(var i=0;i<arr.length;i++){
    if(arr[i]>max){
    max=arr[i];
}if(arr[i]<min){
    min=arr[i];
}
}
console.log("最大值:"+max);
console.log("最小值:"+min)